ORBITAL DEBRIS ASSESSMENT REPORT (ODAR) FOR THE ORBITAL TEST BED (OTB) SATELLITE This document supports the General Atomics Electromagnetic Systems (GA-EMS) Orbital Test Bed Satellite FCC license and has been prepared in accordance with: NASA Technical Standard NASA-STD-8719.14A (inc. change 1, 25-5- 2012) Process for Limiting Orbital Debris DAS Software version used in analysis V 2.1.1 Date: December 2017 Document No.: OTB-DOC-000638-05 General Atomics Electromagnetic Systems 345 Inverness Drive South, Suite 100 Englewood, CO 80112 Tel: 303.790.0653 | Fax: 303.792.2386 DISTRIBUTION STATEMENT: Confidential and proprietary information of GA-EMS. All rights reserved. OTB-DOC-000638-05 ODAR FOR THE ORBITAL TEST BED (OTB) SATELLITE December 2017 APPROVALS Prepared by: Clare Martin, Director Orbital Solutions Signed: Reviewed by: Matt Yavorsky, Systems Engineer Signed: Approved by: Will Thompson, Project Manager Signed: Matthew Yavorsky DOCUMENT REVISION STATUS Revision Nature of Changes Edited by Date Number 01 Initial issue for comment. M Brown Aug ‘13 02 Addition of Section 7A hazardous materials data. M Brown Aug ‘13 Updated spacecraft design information. 03 Updated contacts in 1.1.2, updates to sections 1.1.4, 1.1.7, 2.1.9, 6.1.4, and 6.1.6, figures 2-1 T Murphy Apr ‘15 and 2-2 updated, as well as minor grammatical corrections throughout. 04 Updated for inclusion of the drag augmentation device, complete reformatting of the document T Murphy Sept ‘17 and content. 05 Updated for heritage of the drag augmentation device. Updated following acquisition of SST-US by C Martin Dec ‘17 GA-EMS, including the OTB satellite and all associated IP. i All information contained in this document is proprietary and confidential to GA-EMS and shall not, in whole or in part, be reproduced or disclosed, or used for any purpose other than for which it is provided, without GA-EMS prior written consent. All rights reserved. OTB-DOC-000638-05 ODAR FOR THE ORBITAL TEST BED (OTB) SATELLITE December 2017 Table of Contents 1 Applicable Documents .............................................................................................. 1 2 Acronyms and Abbreviations ....................................................................................... 1 3 PREAMBLE ............................................................................................................. 2 4 ODAR SELF ASSESSMENT ............................................................................................ 3 5 PROGRAM MANAGEMENT AND MISSION OVERVIEW ............................................................. 4 6 SPACECRAFT DESCRIPTION ......................................................................................... 6 7 ASSESSMENT OF SPACECRAFT DEBRIS RELEASED DURING NORMAL OPERATIONS ........................ 10 8 ASSESSMENT OF SPACECRAFT INTENTIONAL BREAKUPS AND POTENTIAL FOR EXPLOSIONS ........... 11 9 ASSESSMENT OF SPACECRAFT POTENTIAL FOR ON-ORBIT COLLISIONS .................................... 14 10 ASSESSMENT OF SPACECRAFT POSTMISSION DISPOSAL PLANS AND PROCEDURES ....................... 16 11 ASSESSMENT OF SPACECRAFT REENTRY HAZARDS ............................................................ 22 12 ASSESSMENT OF SPACECRAFT HAZARDOUS MATERIALS ...................................................... 26 List of Figures Figure 6-1: OTB Block Diagram .......................................................................................... 6 Figure 6-2: OTB Physical Configuration (units in mm) .............................................................. 7 Figure 6-3: Outline of OTB Satellite Configuration (solar panels removed) .................................... 8 Figure 9-1: OTB DAS output for Collisions with Large Objects .................................................. 14 Figure 10-1: Stowed Drag Augmentation Device ................................................................... 16 Figure 10-2: Stowed Drag Augmentation Device (detailed view) ............................................... 17 Figure 10-3: Drag Augmentation Device Activation Diagram .................................................... 17 Figure 10-4: Deployed State of Drag Augmentation Device ...................................................... 18 Figure 10-5: Drag Augmentation Redundancy Diagram ........................................................... 19 Figure 10-6: Orbital Apogee/Perigee Altitude ..................................................................... 20 Figure 11-1: CAD Representation of the Satellite (with callouts of objects used in DAS simulation) .... 23 Figure 11-2: Cutaway View of OTB (with callouts of objects used in DAS simulation) ...................... 24 Figure 11-3: DAS Output for Requirement 4.7-1 ................................................................... 25 List of Tables Table 9-1: Critical Units/Surfaces .................................................................................... 15 Table 10-1: Drag Augmentation Device Technology TRL ......................................................... 18 Table 11-1: Modelled Components of the Spacecraft ............................................................. 22 Table 12-1: Hazardous materials data ............................................................................... 26 ii All information contained in this document is proprietary and confidential to GA-EMS and shall not, in whole or in part, be reproduced or disclosed, or used for any purpose other than for which it is provided, without GA-EMS prior written consent. All rights reserved. OTB-DOC-000638-05 ODAR FOR THE ORBITAL TEST BED (OTB) SATELLITE December 2017 1 Applicable Documents AD# Title Doc. No. Issue AD-1 NASA Technical Standard NASA-STD-8719.14A (inc. NASA-STD- May 25th, Change 1, 25-5-2012) Process for Limiting Orbital Debris 8719.14A 2012 AD-2 NASA Debris Assessment Software (DAS) v. 2.1.1 AD-3 GUIDANCE ON OBTAINING LICENSES FOR SMALL 13-445 March 15th, SATELLITES 2013 AD-4 Background Information on the Orbital Test Bed OTB-DOC- August 2013 Satellite for the FCC 000639-02 2 Acronyms and Abbreviations AFRL Air Force Research Laboratory CAD Computer Aided Design DAS Debris Assessment Software DSAC Deep Space Atomic Clock EELV Evolved Expendable Launch Vehicle EOM End of Mission ESPA EELV Secondary Payload Adapter FCC Federal Communications Commission GA-EMS General Atomics Electromagnetic Systems HDRM Hold Down Release Mechanism HDRS Hold Down and Release System JPL Jet Propulsion Laboratory LANL Los Alamos National Laboratory LEO Low Earth Orbit MSA Modular Solar Array N/A Not Applicable NASA National Aeronautics and Space Administration ODAR Orbital Debris Assessment Report OTB Orbital Test Bed PDM Power Distribution Module RF Radio Frequency SERB Space Experiments Review Board USAF United States Air Force 1 All information contained in this document is proprietary and confidential to GA-EMS and shall not, in whole or in part, be reproduced or disclosed, or used for any purpose other than for which it is provided, without GA-EMS prior written consent. All rights reserved. OTB-DOC-000638-05 ODAR FOR THE ORBITAL TEST BED (OTB) SATELLITE December 2017 3 PREAMBLE The Orbital Debris Assessment Report (ODAR) has been prepared by GA-EMS for the Orbital Test Bed (OTB) satellite. It considers in turn each of the requirements for limiting the generation of orbital debris, as specified in the NASA Technical Standard. As such, this document has been prepared in accordance with reference [1] using the following software tool: DAS software version 2.1.1 [2]. This document supports GA-EMS’ application for an experimental license [3]. Further information on OTB’s RF system is provided in reference [4]. 2 All information contained in this document is proprietary and confidential to GA-EMS and shall not, in whole or in part, be reproduced or disclosed, or used for any purpose other than for which it is provided, without GA-EMS prior written consent. All rights reserved. OTB-DOC-000638-05 ODAR FOR THE ORBITAL TEST BED (OTB) SATELLITE December 2017 4 ODAR SELF ASSESSMENT Orbital Debris Assessment Report Evaluation: Orbital Test Bed (OTB) Mission. This provides a summary overview of the compliance against requirements. The details for each requirement are contained within the body of this report. Note: GA-EMS is not responsible for the launch vehicle ODAR. Reqm’t Launch Vehicle Spacecraft Comments # Complaint Not Incomplete Standard Compliant Not Incomplete Note: GA-EMS is not responsible for Compliant Non- or N/A Compliant Compliant the launch vehicle ODAR 4.3-1.a x Compliant – no debris released 4.3-1b x Compliant – no debris released 4.3-2 x Compliant – no debris released 4.4-1 x Compliant – no credible risk of explosion 4.4-2 x Compliant – end of mission passivation 4.4-3 x N/A – no planned explosions or intentional collisions 4.4-4 x N/A – no planned explosions or intentional collisions 4.5-1 x Compliant – probability of collision 0.00031 4.5-2 x Compliant – probability of collision 0.000506 4.6-1(a) x Compliant – deorbit 23.76 years from EOM or 25.76 years from launch 4.6-1(b) x N/A – atmospheric re-entry disposal 4.6-1(c) x N/A – atmospheric re-entry disposal 4.6-2 x N/A – OTB will be in LEO 4.6-3 x N/A – OTB will be in LEO 4.6-4 x Compliant – significant spacecraft heritage and EOM HDRM heritage 4.7-1 x Compliant – no objects expected to survive re-entry, 1:100000000 4.8-1 x N/A – no tether on OTB 3 All information contained in this document is proprietary and confidential to GA-EMS and shall not, in whole or in